The virtual machine displays the error "The root file system is already mounted read-write." after startup. What should I do?

Symptom

The virtual machine displays the error "The root file system is already mounted read-write." after startup.

As shown in Figure 1:

Cause

The disk device name has changed, preventing the virtual machine from booting normally.

Solution

1. Log in to the virtual machine console and run the blkid command to query and record the disk UUID.

2. Run the vim /etc/fstab command to open the fstab file for editing and mount the disk to the corresponding partition using the UUID.

   As shown in Figure 2: